Roll Skia from b472cacb48d6 to 51d7e221fef0 (2 revisions)

https://skia.googlesource.com/skia.git/+log/b472cacb48d6..51d7e221fef0

2024-08-20 [email protected] Add [[nodiscard]] to Sk[I]Rect::intersect
2024-08-20 [email protected] Reland "[graphite] Add purge() method to DrawAtlas."

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/skia-flutter-autoroll
Please CC [email protected],[email protected],[email protected],[email protected] on the revert to ensure that a human
is aware of the problem.

To file a bug in Skia: https://bugs.chromium.org/p/skia/issues/entry
To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Author: skia-flutter-autoroll

DEPS

@@ -14,7 +14,7 @@ vars = {
   'flutter_git': 'https://flutter.googlesource.com',
   'skia_git': 'https://skia.googlesource.com',
   'llvm_git': 'https://llvm.googlesource.com',
-  'skia_revision': 'b472cacb48d6a00d745a34e974983a9e7b18a346',
+  'skia_revision': '51d7e221fef0346f4ea55f498abc0bade16d0d0c',
 
   # WARNING: DO NOT EDIT canvaskit_cipd_instance MANUALLY
   # See `lib/web_ui/README.md` for how to roll CanvasKit to a new version.

ci/licenses_golden/licenses_skia

@@ -1,4 +1,4 @@
-Signature: 88e55864b2ec524d586c752a4fa0a71f
+Signature: c288d0ce77fc24b8629a2e9e4f03a2a9
 
 ====================================================================================================
 LIBRARY: etc1
@@ -397,6 +397,7 @@ FILE: ../../../flutter/third_party/skia/modules/pathkit/perf/pathops.bench.js
 FILE: ../../../flutter/third_party/skia/modules/pathkit/perf/perfReporter.js
 FILE: ../../../flutter/third_party/skia/modules/skparagraph/test.html
 FILE: ../../../flutter/third_party/skia/package-lock.json
+FILE: ../../../flutter/third_party/skia/relnotes/intersect.md
 FILE: ../../../flutter/third_party/skia/src/gpu/gpu_workaround_list.txt
 FILE: ../../../flutter/third_party/skia/src/ports/fontations/Cargo.toml
 FILE: ../../../flutter/third_party/skia/src/sksl/generated/sksl_compute.minified.sksl